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The Birth of FM Radio Transmissions

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The initial radio frequency modulation (FM) system was developed by Major Edwin H. Armstrong. A veteran  of the World War I, U.S. Signal Corps, Armstrong received 5 patents for his system on December 26, 1933. Shortly thereafter, he began to experiment with different megahertz (MHz) frequencies and wattage. In 1935, Armstrong sent an experimental broadcast through a transmitter located on New York’s Empire State Building and in 1938; he began broadcasting from his own station W2XMN. The station eventually broadcast several hours of Columbia Broadcasting System (CBS) programs several hours a day. Broadcasting continued until his death in 1954.  January 4, 1940 is usually accepted as the date of the first network broadcast. On this date, a one-hour broadcast was transmitted from station W2XCR Yonkers, New York to W2XMN in Alpine, NJ. The broadcast was then received by the Meriden, CT station W1XPW and W1XOJ in Paxton, MA, before it finally terminated with the Yankee Network Weather S